What happens to the population size or each of the pond organisms when the perch population size is decreased? how many of the species in the food web are affected by a population change in a single species?

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur